HVAC Mastery vs Tip Math Practice

HVAC Mastery is the hands-on study companion for anyone learning the heating, ventilation, air conditioning and refrigeration trade, from first-year apprentices to experienced technicians getting certified. Made by a working HVAC service tech. EPA 608 CERTIFICATION PREP - 443 practice questions across all four sections: Core, Type I, Type II and Type III - Checked against current EPA rules (40 CFR Part 82, Subpart F) - Timed practice exams by section, with an explanation for every answer - A readiness score so you know when you're ready for the real test LEARN THE TRADE 4 learning tracks take you from fundamentals to certification: - HVAC Fundamentals: heat transfer, refrigeration cycle, system components, electrical basics - Core Systems: air conditioning, heat pumps, gas furnaces, air distribution, controls - Advanced Systems: commercial refrigeration, hydronic systems, IAQ, building automation - EPA 608 Certification: all four sections with full practice exams 68 bite-size lessons as swipe cards with real equipment drawings. SIM LAB: LIVE SIMULATORS Break a part, meter it, and solve the service call: - Refrigeration cycle: live pressures, superheat and subcooling on 5 systems, with real faults to diagnose - Motor wiring: condensing unit, furnace blower, ECM, three-phase and more, with a meter and clamp meter - Thermostat wiring: gas furnace + AC, package unit and heat pump, with live 24 V - Electrical diagram: 6 systems and 79 faults to find with a working meter FIELD TOOLS - P/T chart, superheat and subcooling, charge check - Ohm's law, wire sizing, motor amps, capacitors - Duct sizing, airflow, psychrometrics, line sets - Unit converter and a refrigerant guide including R-454B and R-32 STUDY FEATURES - 190+ flashcards and module quizzes - Bookmarks and personal notes on any lesson - Daily study reminders to keep your streak alive - Progress tracking with badges - Dark mode - English or Spanish: switch in Profile or in iPhone Settings - Made for iPhone Duo and iPad - Sign in to back up your progress and pick it up on another device No ads, no subscriptions. Just the knowledge you need to pass your exams and succeed in the field.

Practice tip percentages with real-life bills. Tip Math helps you sharpen mental math by calculating tips for restaurant, barber, hairdresser, and tattoo bills. Choose Easy mode for simple percentages, Normal mode for a fuller challenge, or unlock Custom mode to practice your own tip percentages.